Bottle cap



FIG. 1 is a front elevational view of a bottle cap showing our new design mounted on a bottle which is shown in phantom line and forms no part of the design, the back elevational view being identical;

FIG. 2 is a top plan view thereof; and,

FIG. 3 is a bottom plan view thereof, absent the bottle. 

The ornamental design for a bottle cap, as shown and described. 